Steam boiler



Jan. 14, 1930. E. A. KINGSLEY STEAM BOILER Filed Feb. 24, 1928 INVENTOR. .r/y BY W4 ATTORNEYS.

Patented Jan. 14;, 193%) PATENT OFFICE.

EDWIN A. KINGSLEY, OF RUTHERFORD, NEW "JERSEY STEAM BOILER Application filed February 24, 1928. Serial No. 256,611.

The invention relates to improvements in steam boilers of the low pressure heating type designed for burning coal, oil or other fuel; and the objects thereof include means for arranging a series of water and fire tubes in connection with fire and water chambers whereby the heat and water may be intimately associated together and effect a relatively rapid steaming action and thus readily control the temperature of the steam.

The invention also includes means whereby the flow of fire gases is directed around and through the tubes in such manner that substantially all the heat thereof unnecessary for suitable draft may be absorbed by the confined water.

Also, the objects include means for constructing the boiler in relative small sections, each comprising a complete unit that may be completed at the factory, conveniently handled for shipment and introduction into buildings having limited entrances, and that may be set up and completely installed with comparatively small amount of labor.

For further comprehension of the invention, and of the objects and advantages thereof, reference is had to the following description and accompanying drawing, and to the appended claims in which the various features of the invention are more particulary.

pointed out.

Referring to the drawing in which similar characters of reference designate like parts throughout the several viewsi Figure 1 represents a front elevation of my improved boiler, shown partially in section.

Figure 2 shows a sectional side elevation.

Figure 3 shows a front elevation of one of a pair of similar sections forming one of the complete units of the boiler.

As shown in Figs. land 2, numeral 10 indicates generally an ash-pit base compris- 45 ing four vertical side walls provided at the front with cleaning doors 11, and at the top with pivotally mounted grate-bars 12 arranged to be rock-ed or shaken by the connection rod 13 and operating hand lever 14, all being of well-known construction and adapted to be fabricated at the factory, ready'for installation.

Mounted upon the base 10 are a pair of similar boiler sections 15, each comprising an outer water chamber 16 and an inner fire box ortion 17, the opposite walls of said cham er and box being joined together and forming side, front and rear water walls respectively indicated by 18, 19 and 20. The opposite side plates of the water walls are tied together by the rods 21,'similar tie rods being provided between the top plates of the fire box and water chamber.

Mounted within the fire box portion 17 of each boiler section, are a series of oppositely disposed water tubes 22 having their inner ends closed and their opposite open ends communicating with the water walls 18 in the form of spur tubes, the open ends of the tubes having screw-threaded engagement with the inner sheet 23 of the water walls. The fire box portions of the boiler sections are also provided with a division plate 24 resting upon a horizontal row of the water tubes in spaced relation to the rear water wall and forming a lower flue 25and an upper flue 26 for the passage of the gases of combustion both forward toward the rear of the boiler and backward toward the front end thereof.

WVithin the water chamber 16 of each boiler section, a series of fire tubes 27' are provided having their opposite ends expand ed in the front and rear plates of the chamber, the front and the rear ends of the tubes communicating respectively with the flue chamber 28 and the smoke box 29. The fine chamber 28 affords communication between the upper flue passage 26 and the fire tubes 27, the chamber being also provided with a door30 by means of which access may be had for cleaning the several series of tubes. The smoke box 29 is provided with a freshair inlet door 31 and a damper 32 for regulating in the usual manner the draft of the smoke pipe 33'. y

In assembling the boiler sections 15 upon the a'sh-pit base 10, a common water supply connects the two sections by means of the yokefitting 34 disposed at the base. of the rear water walls, a similar fitting 35 connecting the two sections together at the top of the water chambers 16 to form a common steam outlet. The water level within the chambers, as indicated by the dotted line 36, is shown in spaced relation to the top walls thereof .to form steam spaces communicating with the common outlet 35. The boiler is provided with the usual fittings for controlling the level of the water and the pressure of the steam, including a safety valve indicated at 38.

Insulation covering for the outer surface of the boiler is shown at 37, and a fire-bed covering the grate-bars 12 is indicated at 39.

As the products of combustion from the fire-bed pass through the fines 25 and 26 and around and between the water tubes in fire box, the water within the relatively thin Walls of the tubes becomes closely associated with the heat and is quickly converted into steam, which passes upwardly through the several vertical water walls and the water chamber to the common outlet connection 35. The'rapidity of the steaming action ofthe boiler being proportional to quantity of fuel burned under the influence of the draft from the smoke pipe 33, the control of the latter by the damper 32 and the fresh air inlet door 31 acting in connection with well-known forms of automatic temperature regulators, afiords means whereby the steaming action of the boiler may be quickly varied to suit difierent heat requirements with a consequent proportional saving in fuel used.

In the passage of the hot gases through the boiler the principal heating effect is obtained by the Water tubes 22 within the fire box, the upper fire tubes 27 also absorbing and transmitting to the water or steam a certain amount of heat depending upon the rapidity of the firing action of the boiler.

lVhile I have shown the grate bars 12 of the boiler as covered by a fire bed of coal 39, introduced in the usual manner through fire doors 40, it is to be understood that other fuel, such as oil may be used with equal or possibly greater advantage for firing purposes.

I claim:

a 1. A steam boiler comprising a pair of oppositely disposed similar sections having side water walls, fire-box portions in said sections arranged to register with each other, a water chamber in said sections above said fire-box portions and communicating with said water walls, a series of spur tubes arranged above said fire-box portions and communicating with and extending inwardly from the side water walls of said sections, fire tubes extend ing through the water chamber of said sections in a right angular direction to said spur tubes, the opposite ends of said fire tubes extending through the outer end walls of said sections, means for connecting said boiler sections together, and means for directing the heat from said fire-box portions around said spur tubes and through said fire tubes.

2. A steam boiler comprising a pair of oppositely disposed similar sections having side water walls, firebox portions in said sections arranged to register with each other, a water chamber in said sections above said fire-box portions and communicating with said water walls, a series of spur tubes arranged above said fire-box portions and communicating with said water walls of said sections and extending inwardly therefrom, fire tubes extending through the water chamber of said sections in a right angular direction to said spur tubes, the opposite ends of said fire tubes extending through the outer end walls of said sections, common flue connections leading from said fire-box portions andpassing between said spur tubes and through said fire tubes, and means for connecting said boiler sections together. Signed at New York, in the county of Ne York and State of New York, this 16th day of February A. D., 1928. L

ED'WIN A. KIN GSLEY. 

